# Euroref Compare - Multi-Country Government Reference Series

> Euroref Compare - Multi-Country Government Reference Series is a paid API for AI agents from euroref.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).

Compare a single European government reference data series (VAT, policy rate, minimum wage, CPI, corporate tax, etc.) across up to 10 countries in one call, with each row cited to its official source

## Facts

- Endpoint: GET https://euroref.dev/v1/compare?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/euroref-compare-multi-country-government-reference-series-8b3517cb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wxQe9M7DfYH0KzSMunyeO

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability euroref-compare-multi-country-government-reference-series-8b3517cb
```

Example prompt: Can you compare the corporate tax rates for Germany, France, Italy, Spain, and the Netherlands side by side, with the official source and effective date for each country?

## When to prefer this

Use this endpoint when you need to compare a single standardized government reference metric (VAT, policy rate, minimum wage, corporate tax, CPI) across multiple European countries simultaneously with official source citations. It is more efficient than calling individual country endpoints one at a time and provides audit-ready provenance data. Choose this over the full snapshot endpoint when you only need one series, not all series for all countries.

## Known failure modes

- Invalid or unsupported series ID returns an error referencing valid series from /catalog
- Country code not supported or not in the euroref dataset returns a partial or error response
- More than 10 countries specified returns a validation error
- Malformed ISO country codes result in a 400 bad request
- Payment not provided or insufficient USDC balance returns a 402 Payment Required

## How this service works

Compare one government reference series (VAT, policy rate, minimum wage, CPI, corporate tax...) across up to 10 European countries in one call, each row cited to its official source with effective and last-confirmed dates

## Output

A structured JSON array with one row per requested country, each containing the series identifier, country code, current value, effective date, last-confirmed date, and a URL citation to the official government or central bank source.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "series",
      "countries"
     ],
     "properties": {
      "series": {
       "type": "string",
       "description": "One series id from GET /catalog, e.g. vat, policy-rate, minimum-wage, corporate-tax"
      },
      "countries": {
       "type": "string",
       "description": "Comma-separated ISO 3166-1 alpha-2 codes on this brand, at most 10"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/euroref-compare-multi-country-government-reference-series-8b3517cb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from euroref.dev](https://www.zero.xyz/host/euroref.dev/llms.txt)